Option Trap Indicator
How to read signals PB · Buy PS · Sell PE · Exit
Compare end-of-day price breaks beyond the largest OI walls and the writer OI changes behind them. Each session uses its nearest valid expiry.
PB · Probable Buy
A call-writer trap: the underlying closes above the maximum call OI strike. The scanner labels the price direction bullish.
PS · Probable Sell
A put-writer trap: the underlying closes below the maximum put OI strike. The scanner labels the price direction bearish.
PE · Probable Exit
A later close returns to or crosses the original trapped wall before expiry. Here, PE is an exit label; in the wall columns, PE means put options.
Understand strength, OI and underlying move
- What upgrades a trap?
- Writer OI Δ = change in OI ÷ current OI at the trapped strike. Below −10% is Explosive; below −5% is Strong; below 0% is Moderate. Zero or positive OI change is Developing.
- What does /100 mean?
- The score starts at 50, adds twice the magnitude of negative OI change in percentage points, and caps at 100. It ranks unwinding intensity; it is not a calibrated probability.
- What is underlying move?
- Percentage price movement from the signal close to the first recorded wall re-entry, expiry close or latest available close. Bearish moves reverse the sign, so positive means movement in the signal direction. This is not option P&L.
- How should I compare events?
- A symbol may trigger on several dates, so events can overlap. Follow-through uses only events with a later close. Open and completed events have different observation lengths; the percentage is not a strategy win rate.
Trap scanner
Updating sessions…Checking subscription...
What the Option Trap Indicator shows
The Option Trap Indicator scans every NSE F&O stock for call writer traps and put writer traps: sessions where price closes beyond the strike with the highest open interest while the writers at that strike are unwinding. Each event is tiered Explosive, Strong, Moderate or Developing by how much open interest left the wall.
The scan covers the latest 15 trading sessions, uses each session's nearest valid expiry and shows what price did afterwards, so you can see how each trap developed. It is an end-of-day screen for study, not a recommendation to buy or sell.